Experimental and computational investigation of a DNA-shielded 3D metal–organic framework for the prompt dual sensing of Ag+ and S2−
| Autor: | Rong-Tian Li, Cheng Fan, Wen-Jun Duan, Nai-Han Huang, Ling-Yan Zhai, Ke-Yang Wu, Zi-Chuan Yang, Jin-Xiang Chen, Shao-Lan Cai |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Materials science General Chemical Engineering Analytical chemistry Molecular simulation 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence World health 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Bromide law Shielded cable Metal-organic framework A-DNA 0210 nano-technology |
| Zdroj: | RSC Advances. 9:15424-15430 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c9ra02028d |
| Popis: | We herein report an efficient Ag+ and S2− dual sensing scenario by a three-dimensional (3D) Cu-based metal–organic framework [Cu(Cdcbp)(bpea)]n (MOF 1, H3CdcbpBr = 3-carboxyl-(3,5-dicarboxybenzyl)-pyridinium bromide, bpea = 1,2-di(4-pyridinyl)ethane) shielded with a 5-carboxytetramethylrhodamine (TAMRA)-labeled C-rich single-stranded DNA (ss-probe DNA, P-DNA) as a fluorescent probe. The formed MOF-DNA probe, denoted as P-DNA@1, is able to sequentially detect Ag+ and S2− in one pot, with detection limits of 3.8 nM (for Ag+) and 5.5 nM (for S2−), which are much more lower than the allowable Ag+ (0.5 μM) and S2− (0.6 μM) concentration in drinking water as regulated by World Health Organization (WHO). The detection method has been successfully applied to sense Ag+ and S2− in domestic, lake, and mineral water with satisfactory recoveries ranging from 98.2 to 107.3%. The detection mechanism was further confirmed by molecular simulation studies. |
| Databáze: | OpenAIRE |
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